... aluminium, bronze, copper, PVC, acrylic, wood. Bi-metal construction.Special M-3 HSS cutting teeth. 4/6 T.P.I. variable ... Pilot Drills For Bi-Metal Hole Saws, 7pcs Bi-metal hole saws set in blow moulding case 5 Bi-metal hole saws --Metric sizes: 22, 25 ... ): 40G.W.(KGS):25CUFT:2.558pcs Bi-metal hole saws set 5 Bi-metal hole saws -- Metric sizes: 38, 44, 51,57, 65mm ;Fractional ...